The handset is supposed to use USB-C Power Delivery (PD) fast charging technology to provide up to seven hours of battery life from a fifteen-minute charge. It does this by delivering electrical power at 18 Watts, dropping to 10.5 Watts as the charge progresses.

But if the battery's temperature falls below 68 degrees Fahrenheit, or about room temperature, Phone Arena reports that users have found that charging rate drops to just 4W. The result is that the phone takes much longer to charge than normal. Meanwhile the phone still displays that it is "charging rapidly,” even though it is not.

Battery experts say that smartphone batteries charge best within the range of 50 to 86 degrees Fahrenheit, so there is no obvious reason why Google would slow charging at temperatures below 68. The company is reportedly investigating the problem, but has yet to report back or issue a fix.

The slow charging issue is the second glitch that appears to be affecting Google's Pixel 2 handsets following the February update. Earlier this month some Pixel 2 and Pixel 2 XL users reported that their phones were overheating after installing the update.